THE ADT CORPORATION

CUSIP: 00101J106 Class: COM

GENERAL AMERICAN INVESTORS CO INC's Holding History (CIK: 0000040417)

Note: Option positions (PUT/CALL) are excluded.

Q1 2014
Shares 117,500 Value ($000) $3,519 Avg Close — Range —
Q4 2013
Shares 117,500 Value ($000) $4,755 Avg Close — Range —
Q3 2013
Shares 312,500 Value ($000) $12,706 Avg Close — Range —
Q2 2013
Shares 312,500 Value ($000) $12,453 Avg Close — Range —